Dental health and aesthetics are priorities for many, yet oral diseases remain prevalent in daily life. Alveolar bone resorption is a common condition. What factors contribute to this process?
External Factors
In healthy individuals, biting force transmitted through the periodontal ligament to the alveolar bone provides physiological stimulation. This stimulates bone growth while regulating resorption and regeneration, maintaining relative equilibrium.In contrast, denture bases exert direct pressure on the mucosa, constituting pathological stimulation that inevitably triggers bone resorption. For the alveolar ridge, greater pressure per unit area leads to more severe bone loss. This may occur when excessive pressure on the ridge stimulates osteoclasts and causes blood stasis. The mandible, bearing a smaller surface area than the maxilla, experiences more pronounced bone resorption.
Internal Factors
Hormones
Numerous studies confirm estrogen as the primary hormone regulating bone metabolism. Particularly during menopause, reduced estrogen levels deprive osteoblasts of stimulation, leading to insufficient bone matrix formation and impaired calcium salt deposition—resulting in osteoporosis.
Parathyroid hormone (PTH) acts as an intermediary in osteoporosis. Estrogen enhances bone sensitivity to PTH, thereby promoting bone resorption.Calcitonin secretion is regulated by serum calcium levels. It directly inhibits osteoclast formation, promotes calcium ion deposition, and antagonizes PTH effects. Prostaglandins (PG), hormone-like substances, increase cAMP levels by activating adenylate cyclase. Elevated cAMP induces monocytes to differentiate into osteoclasts.
Trace Elements
Human trace elements and calcium-phosphorus metabolism are interrelated with bone metabolism. Zinc deficiency reduces alkaline phosphatase and collagenase activity; copper deficiency diminishes lysyl oxidase, monoamine oxidase, and cytochrome oxidase activity, leading to impaired collagen cross-linking, reduced bone deposition, and accelerated bone resorption.
Manganese deficiency disrupts bone calcium regulation, increasing resorption. Magnesium is a key component of bone structure, regulating calcium-phosphorus metabolism and bone mineralization. Fluoride reacts with hydroxyapatite to form stable fluorapatite, inhibiting resorption and promoting bone formation.Nutritional Deficiencies Patients with missing teeth, particularly edentulous elderly individuals, should also be mindful of alveolar ridge atrophy caused by malnutrition. Vitamin D and calcium-rich foods help maintain alveolar bone volume and delay ridge resorption; high-protein diets increase calcium excretion and promote bone resorption.
Numerous factors in daily life can contribute to alveolar bone resorption. This condition causes significant distress for many individuals and presents considerable treatment challenges. We should take alveolar bone resorption seriously, implement preventive measures early, and avoid letting it compromise our dental health.